AU215161B2 - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU215161B2
AU215161B2 AU23175/56A AU2317556A AU215161B2 AU 215161 B2 AU215161 B2 AU 215161B2 AU 23175/56 A AU23175/56 A AU 23175/56A AU 2317556 A AU2317556 A AU 2317556A AU 215161 B2 AU215161 B2 AU 215161B2
Authority
AU
Australia
Prior art keywords
telephone systems
telephone
systems
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
AU23175/56A
Other versions
AU2317556A (en
Inventor
Henry Keating and Gilbert Jessop Beckett John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
Filing date
Publication date
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Application granted granted Critical
Publication of AU2317556A publication Critical patent/AU2317556A/en
Publication of AU215161B2 publication Critical patent/AU215161B2/en
Expired legal-status Critical Current

Links

AU23175/56A 1956-11-14 Improvements in telephone systems Expired AU215161B2 (en)

Publications (2)

Publication Number Publication Date
AU2317556A AU2317556A (en) 1957-05-16
AU215161B2 true AU215161B2 (en) 1957-05-16

Family

ID=

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